30142819 has 16 divisors (see below), whose sum is σ = 37656576. Its totient is φ = 23529600.

The previous prime is 30142817. The next prime is 30142823. The reversal of 30142819 is 91824103.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 30142819 - 2¹ = 30142817 is a prime.

It is a super-2 number, since 2×30142819² = 1817179074533522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30142813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397 + ... + 7774.

It is an arithmetic number, because the mean of its divisors is an integer number (2353536).

Almost surely, 2^30142819 is an apocalyptic number.

30142819 is a deficient number, since it is larger than the sum of its proper divisors (7513757).

30142819 is a wasteful number, since it uses less digits than its factorization.

30142819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8226.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 30142819 is about 5490.2476264737. The cubic root of 30142819 is about 311.2155500223.

The spelling of 30142819 in words is "thirty million, one hundred forty-two thousand, eight hundred nineteen".